Refill head



FIG. 1 is a top perspective view of a refill head showing our new design;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is another side view thereof;

FIG. 6 is another side view thereof; and,

FIG. 7 is a bottom view thereof. 

We claim the ornamental design for a refill head, as shown and described. 